Some physics questions i desperately need help with!?

1)An ac circuit has an rms current of 5.0 A. What is the peak current?

2) A hair dryer is rated at 1200 W when plugged into a 120-V outlet. Find (a) its rms current, (b) its peak current, and (c) its resistance.

3) Find the rms and peak currents in a 40-W, 120-V lightbulb.

4) What capacitance would have a reactance of 100 olms in a 60-Hz ac circuit.

5) Find the frequency at which a 250-mH inductor has a reactance of 400 olms.

6) A series RL circuit has a resistance of 100 olms and an inductance of 100 mH and is driven by a 120-V, 60-Hz source. (a) Find the inductive reactance and the independance of the circuit. (b) how much current is drawn from the source?

Thanks I really could use the help! :)

Some physics questions i desperately need help with!?

Ok i'll try to help with some, but not all

1. To find ipeak, you simply multiply Irms by the square root of two! So the answer should be around 7.7106 Amps

2. Power = V^2/R ==%26gt; R = V^2/Power = 12 Ohms. Power = i(rms) ^2 * R ==%26gt; i(rms) = sqrt(Power/R) = sqrt(100) = 10 Amps. i(peak) = i(rms)*sqrt(2) = 14.14 Amps.

3. I guess this one is about the same as the previous

4. Xc (reactance) = 1/wc; w = 2*pi*Frequency, C: capacitance

So: Xc = 1/(2*pi*frequency*c), just equate Xc to 100, and solve for C

5. X_L (L as a subscript) = w*L; L: inductance in Henrys. Again, w = 2*pi*frequency

6. Im still not that good with driven stuff...

I just had this stuff in class; like 6 hours ago, im not completely sure of my stuff, but im fairly certain.